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AP Chemistry
5.3 Concentration Changes Over Time
BeginnerMCQGraphicalMathematicalConceptual22.3k
Draw a grayscale Cartesian graph on a white background. The horizontal axis is labeled “Elapsed time (s)” and extends from 0 to 40, with evenly spaced tick marks at 0, 10, 20, 30, and 40. The vertical axis is labeled “\(1/[\text{A}]\ (\text{M}^{-1})\)” and extends from 0 to 10, with evenly spaced tick marks at 0, 2, 4, 6, 8, and 10. Place five solid black circular data points at the exact coordinates \((0,2)\), \((10,4)\), \((20,6)\), \((30,8)\), and \((40,10)\). Draw a thin solid straight best-fit line through all five points. Use bare axes without gridlines. No legend, equation, title, arrows, or additional annotations appear.
Concentration data collected during the decomposition reaction
A student studies the decomposition of a hypothetical reactant, \(\text{A(aq)} \rightarrow \text{products}\), at constant temperature. The student measures the reactant concentration at several times and plots the data as shown.

Which of the following correctly identifies the order of the reaction with respect to \(\text{A}\) and justifies the answer?

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